10 Important Dates in Mars History: References & Edit History
Article Contributors
Primary Contributors
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Alison Eldridge
Alison Eldridge was Managing Editor at Encyclopaedia Britannica.
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Erik Gregersen
Erik Gregersen is a senior editor at Encyclopaedia Britannica, specializing in the physical sciences and technology. Before joining Britannica in 2007, he worked at the University of Chicago Press on the Astrophysical Journal. Prior to that, he worked at McMaster University on the ODIN radio astronomy satellite project.